Hi,

If you have quite higher percentage of writes against reads, then RAID 5 is better than RAID 10.

However, you can download the following book by Jonathan Kehayias:

http://www.red-gate.com/community/books/accidental-dba?utm_source=simple-talk&utm_medium=webpage&utm_content=troubleshooting_ebook&utm_campaign=sqlmonitor

and decide what configuration to choose.

Regards

IgorMi